[srsran-users] srsRAN 4G with ZMQ When EPC and eNB are Separated

[Chao-Hwa Chen]

Hi all,

I would like to have EPC and eNB with different Linux hosts. I followed the
suggestion (see
https://lists.srsran.com/pipermail/srsran-users/2019-June/002674.html). At
the EPC side, I type
./srsepc/src/srsepc --mme.mme_bind_addr=(EPC host IP)
--spgw.gtpu_bind_addr=(EPC host IP)

At the eNB side, I type
./srsenb/src/srsenb --rf.device_name=zmq
--rf.device_args="fail_on_disconnect=true,tx_port=tcp://*:2000,rx_port=tcp://(UE
host IP):2001,id=enb,base_srate=23.04e6" --enb.mme_addr=(EPC host IP)
--enb.gtp_bind_addr=(EPC host IP) --enb.s1c_bind_addr=(EPC host IP)

There is no connection reaction from the EPC side and at the eNB, it shows
the following:
Built in Release mode using commit 00c972ac4 on branch master.

bind(): Cannot assign requested address
Failed to bind on address (EPC host IP), port 2152: Cannot assign requested
address
Error initializing EUTRA stack.
Opening 1 channels in RF device=zmq with
args=fail_on_disconnect=true,tx_port=tcp://*:2000,rx_port=tcp://(UE host
IP):2001,id=enb,base_srate=23.04e6
Supported RF device list: soapy zmq file
CHx base_srate=23.04e6
CHx id=enb
Current sample rate is 1.92 MHz with a base rate of 23.04 MHz (x12
decimation)
bind(): Cannot assign requested address
CH0 rx_port=tcp://(UE host IP):2001
CH0 tx_port=tcp://*:2000
CH0 fail_on_disconnect=true

How should I fix this issue?

Thanks a lot in advance.

Best Regards,

Chao-Hwa
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